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| 型號： | SI2401FS08-EVB |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 5/76頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL SI2401 + SI3008 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ISOmodem® |
| 主要目的： | 電信，數(shù)據(jù)采集裝置（DAA） |
| 已用 IC / 零件： | SI2401 |
| 已供物品： | 板，CD |
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Si2401
Rev. 1.0
13
4.1. Serial Interface
The Si2401 has a universal asynchronous receiver/
transmitter (UART) serial interface compatible with
standard microcontroller serial interfaces. After powerup
or reset, the speed of the serial (Data Terminal
Equipment—DTE)
interface
is
set
by
default
to
2400 bps with the 8-bit, no parity, and one-stop bit (8N1)
format described below.
The serial interface DTE rate can be modified by writing
SE0[2:0] (SD) with the value corresponding to the
desired DTE rate. (See Table 8.) This is accomplished
with the command, ATSE0=xx, where xx is the
hexadecimal value of the SE0 register.
Immediately after the ATSE0=xx string is sent, the host
UART must be reprogrammed to the new DTE rate in
order to communicate with the Si2401.
The carriage return character following the ATSE0=xx
string must be sent at the new DTE rate to observe the
“O” response code. See Table 12 on page 24 for the
response code summary.
4.2. Configurations and Data Rates
The Si2401 can be configured to any of the Bell and
CCITT operation modes listed in Table 9. When
configured
for
V.22bis,
the
modem
connects
at
1200 bps if the far end modem is configured for V.22.
This device also supports SIA and other protocols for
the security industry. Table 7 provides the modulation
method, carrier frequencies, data rate, baud rate, and
notes on standard compliance for each modem
configuration of the Si2401. Table 9 shows example
register settings (S07) for some of the modem
configurations.
As shown in Figure 3, 8-bit and 9-bit data modes refer to
the DTE format over the UART. Line data formats are
configured through registers S07 (MF1) and S15 (MLC).
If the number of bits specified by the format differs from
the number of bits specified by the DCE data
communications equipment or line (DTE) format, the
MSBs are either dropped or bit-stuffed, as appropriate.
For example, if the DTE format is 9 data bits (9N1), and
the line data format is 8 data bits (8N1), the MSB from
the DTE is dropped as the 9-bit word is passed from the
DTE side to the DCE (line) side. In this case, the
dropped ninth bit can then be used as an escape
mechanism. However, if the DTE format is 8N1, and the
line data format is 9N1, an MSB equal to 0 is added to
the 8-bit word as it is passed from the DTE side to the
DCE side.
The Si2401 UART does not continuously check for stop
bits on the incoming digital data. Therefore, if the TXD
pin is not high, the RXD pin may echo meaningless
characters to the host UART. This requires the host
UART to flush its receiver FIFO upon initialization.
Figure 3. Link and Line Data Formats
Table 8. DTE Rates
DTE Rate (bps)
SE0[2:0] (SD)
300
000
1200
001
2400
010
9600
011
19200
100
38400
101
115200
110
307200
111
Table 9. Modem Configuration Examples
(S07[7] (HDEN) = 0, S07[6] (BD) = 0)
Modem Protocol
Register S07 Values
V.22bis
0x06
V.22
0x02
V.21
0x03
Bell 212A
0x00
Bell 103
0x01
V.23 (1200 tx, 75 rx)
0x16
V.23 (75 tx, 1200 rx)
0x26
V.23 (600 tx, 75 rx)
0x10
V.23 (75 tx, 600 rx)
0x20
DTE Interface
Data Rate: SE0[2:0] (SD)
Data Format: SE0[3] (ND)
DCE (Line) Interface
Data Rate: S07 (MF1)
Data Format: S15 (MLC)
Si3010
Si2401
RJ11
TXD
RXD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI2401FS10-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 SI2401+SI3010 ISO MODEM EVAL. BOARD RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| SI2401-FSR | 功能描述:電信線路管理 IC 2400b/s System Side 3rd Gen DAA Tech RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| SI2401URT-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 U 634-SI2401FS10-EVB RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| SI2403 | 制造商:SILABS 制造商全稱:SILABS 功能描述:V.22BIS ISOMODEM CHIPSET WITH ERROR CORRECTION |
| SI2403-FT | 制造商:Silicon Laboratories Inc 功能描述:MODEM CHIP CHIPSET ISOMODEM 2.4KBPS 24TSSOP - Rail/Tube |
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